xx Porophyllum ruderale (Jacq.) Cass. [ Kleinia ruderalis Jacq.]
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xx Porophyllum ruderale (Jacq.) Cass. [- Kleinia ruderalis Jacq.] [Compositae]
N.J. von Jacquin, Select. Stirp. Amer. Hist., ed. 1780-1781: p. 104, t. 195 (1780-1781) [N.J. Jacquin]